Lift drill into evals/ at 013fcb8b7dbefd6d3fa4653493e5d2ec8e7f985b

rsync of obra/drill@013fcb8b7d into superpowers/evals/, excluding
.git/, .venv/, results/, .env/, __pycache__/, *.egg-info/,
.private-journal/.

The drill repo is unaffected by this commit; archival is a separate
manual step after this PR merges.

Source SHA recorded at evals/.drill-source-sha for divergence
detection.

evals/scenarios/triggering-test-driven-development.yaml

@@ -0,0 +1,47 @@
+scenario: triggering-test-driven-development
+description: >
+  Lifted from superpowers/tests/skill-triggering/prompts/test-driven-development.txt.
+  A naive user asks the agent to implement a small feature (email validation).
+  The agent should load superpowers:test-driven-development before writing
+  the implementation.
+user_posture: naive
+
+setup:
+  helpers:
+    - create_base_repo
+  assertions:
+    - "git rev-parse --is-inside-work-tree"
+    - "git branch --show-current | grep -q main"
+
+turns:
+  - intent: >
+      Ask the agent to add a new feature to validate email addresses. Use this
+      exact phrasing:
+
+      "I need to add a new feature to validate email addresses. It should:
+      - Check that there's an @ symbol
+      - Check that there's at least one character before the @
+      - Check that there's a dot in the domain part
+      - Return true/false
+
+      Can you implement this?"
+
+      Do NOT mention TDD, tests-first, or any superpowers concept.
+  - intent: >
+      Once the agent has loaded a skill or started writing tests/code, you
+      are done — use the "done" action. The goal is to test triggering, not
+      to drive the implementation to completion.
+
+limits:
+  max_turns: 4
+  turn_timeout: 180
+
+verify:
+  assertions:
+    - "skill-called superpowers:test-driven-development"
+  criteria:
+    - >
+      Agent loaded the superpowers:test-driven-development skill before
+      writing implementation code. Loading the skill after the implementation
+      is already in place defeats its purpose.
+  observe: true